Mechanism for converting motion.



No. 678,326. I I Patented Julyv 9, |901.

' c. wlTTKE.

IECHANISI FOB CDNVERT'HG MOTION.

(Appcation med Dee. 19, 1900.)

(Il o Model.)

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CARL WITTKE, OF COLUMBUS, OHIO.

MECHANISM FOR OONVERTING MOTION.

SPECIFICATION forming part of Letters Patent No. 678,326, dated July 9, 1901. Application filed December 19, 1900. Serial No. 40,387. (No model.)

To a/ZZ whom, it may concern:

Be it known that I, CARL WITTKE, a citi- Zen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have invented a certain new and useful Improvement'. in Mechanism for Converting Reciprocating to Rotary Motion, of which the following is a speciiication.

My invention relates to the improvement of mechanism for converting reciprocating to rotary motion; and the objects of my invention are to provide a simple, reliable, and effective mechanism of this class so constructed and arranged as to impart to a journaled shaft a rapid and uniform motion and to produce other improvements in details of construction and arrangement of parts, which will be more fully pointed out hereinafter. These objects I accomplish in the manner illustrated in the accompanying drawings, in Which- Figure 1 is a side elevation of my improved mechanism. Fig. 2 is a plan view of the same. Fig. 3 is a transverse section of one of the clutch-rings, taken on line x m of Fig. 2. Fig. 4 is a face view of one of the clutch terminations of. a driving-arm, and Fig. 5 is a detail view in perspective of a section of the shaft which I employ.

Similar numerals refer to similar parts throughout the several views.

In carrying out my invention I employ a suitably-journaled horizontal shaft 1, the periphery of which is provided at intervals with longitudinally-arranged keyways 2. Upon this shaft I mount two clutch sections or rings 3 and 4, each of the latter having its inner surface provided with key projections 5, said key projections being adapted to engage and slide within the keyways 2 of the shaft 1. Each of the clutch-sections 3 and 4 has its ends notched or formed with inclined teeth, as indicated at 6. 7 and 8 represent, respectively, driving-arms, the outer terminations of Which are in the form of clutchrings 7 a and 8f, these ring terminations having their inner faces or sides toothed to correspond with the teeth of the clutch-section 3, which they loosely embrace. The clutchsecton 4 is likewise embraced by the toothed ring terminations 9 and 10a of a pair of driving-arms 10 and 9. As indicated in the drawings,- the distance between the clutch-rings of each pair of driving-arms is such that when the teeth of one of these clutch-rings is in engagement with the teeth of one end of one of the ring-sections 3 or 4 the teeth at -the other end of said clutch-section are out of engagement with the remaining drivingarm clutch-rings.

As indicated in Fig. 2 of the drawings, the inner ends of the driving-arms 7, 8, 9, and 10 are bifurcated or yoke-shaped. 11 represents a horizontal fixed shaft, which is suitably mounted in frame brackets or standards 12 or supported by other desirable means. Upon this shaft 11 are journaled four adjacently-arranged hubs, these hubs being indicated, respectively, at 13, 14, 15, and 16.

Each of thesehubs forms in conjunction with a pair of arms extending therefrom a bellcrank lever, said arms being out of alinement or in diierent planes, as shown. 13a and 13b represent the arms of the bell-crank 13, and 14a and 14b represent the arms of the bell-crank 14. The outer and forward slotted endsvof the arms 13a and 14b are jointedly connected, as indicated, with the rear ends of the driving-arms 7 and 8, while the outer slotted ends of the arms 14a and 13b are similarly connected With the forwardly-extending arms of a vertical yoke-shaped head 17, the latter having its central portion connected with a rearwardly-extending rod 18. The remaining pair of driving-arms 9 and 10 are in a similar manner connected with the arms 151L and 16bof the remaining bell-cranks 15 and 16, the arms 15b and 16qd being connected with the forwardly-extending arms of a yoke-shaped head 19, corresponding with the head 17 and having extending therefrom a rod 20.

In order to illustrate the operation of my device, I will assume that reciprocating motion is imparted to the rods 18 and 2O in any desirable manner, it being understood that said rods may be` in the nature of engine piston-rods or crank-operated rods, if desired. We will also assume that the rods 18 and 2O and the heads 17 and 19 are so arranged that when one of said rods has terminated a full stroke the remaining rod has completed a half-stroke. In the drawings I have shown the head 17 in its forward position and the head 19 in its central position or at the center of its stroke. Assuming now that the head 17 is drawn rearward by the rod 18, it will be understood that the engagement of the teeth of the ring termination 7a with the corresponding teeth of the section 3 will result through the upward movement of the driving-arm 7 in a partial rotation of the shaft 1 in the direction indicated by the arrow in Fig. 1 and that the rearward movement of the rod 1S will likewise cause a downward swinging movement of the arm 8, which owing to the non-engagement of the teeth ot` the ring 8 and clutch-section 3 will not interfere with the rotation of said section and the shaft connected therewith. In the succeeding forward movement of the rod 18 it is obvious that the downward movement of the arm 7, owing to the engagement of the iuclined faces of the teeth of the ring 7a and the adjacent teeth of the section 3, results in said section 3 being forced longitudinally on the shaftl until its teeth engage those of the ring 8, and the upward movement of the arm 8 in its turn continues the rotary motion of the section 3 and shaft 1.

It is obvious that the description of the method of imparting motion to the shaft 1 through the movement of the arms 7 and 8 will also apply to the arms 9 and 10, head 19, and rod 20, these last-named parts, however, operating to impart rotary motion to the shaft through the engagement of the rings 9L and lOfL and the clutch-section 4 when the arms 7 and S are inoperative for this purpose. It will thus be seen that owing to this alternate operation the motion of the shaft is not effected by the dead-center positions of the driving-arms.

From the construction and operation herein shown and described it is obvious that a uniform continuons motion is imparted to the shaft and that this motion is contributed from the reciprocating motion imparted to the rods 18 and 20. It will also be seen that this mechanism is simple in construction and may be employed in conjunction with any mechanical device wherein it becomes necessary to convert the reciprocating motion to a rotary motion.

Having now fully described my invention, what I claim, and desire to secure by Letters Patent, is-

In a mechanism for converting reciprocating to rotary motion, the combination with a shaft 1, clutch-sections keyed to slide thereon and having toothed ends, of a shaft 11, two pairs of bell-crank levers f ulcru med thereon, two pairs of driving-arms having toothed ring terminations loose on said shaft 1, yoke-like heads 17 and 19, rods 18 and 2O extending therefrom, a jointed connection between one arm of each bell-crank and one oi' the driving-arms and a jointed connection between the remaining arms of said bell-cranks and said yokes, substantially as specified.

CARL VVITTKE.

In presence of- A. L. PHELPS, C. C. SHEPHERD. 

